Ernst von Glasersfeld, developer of radical constructivism, has died of pancreatic cancer at his home in Leverett, Massachusetts. He was 93 years old.

Von Glasersfeld’s radical constructivism is based on two premises: (a) knowledge is not passively received, but actively constructed by people; and (b) the purpose of human constructions is adaptive, not representational. His work has been influential in a variety of areas, including applications to education and psychotherapy.

I am delighted that you are posting my videos of Ernst von Glasersfeld. Just as one provides the source when referencing a book I would hope you would credit the source when posting video. For example, for this posting I suggest: